Advice

Alright so I need advice!! Long story short!! My fiancé and I are trying to get pregnant. I had a miscarriage in March, ended up getting the iud then got off that and got on birth control in June. Well in July we decided let’s just stop worrying if it happens and let’s go for it. We already have 3 kids, he has one and I have 2. I have been off everything since mid July. Any advice on what I can do to ensure I’m good and can get pregnant and help make it happen sooner! We are 30 and we want two more, ideally back to back.